One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,9,6,10,5,8)(3,11,12,7,14,15,13,16)(17,18,21,25,22,24,20,29)(19,26,27,23,28,32,30,31)(33,34)(35,43,46,47)(36,40)(37,41)(38,42)(39,45,48,44)(1,3,5,13,6,14,4,12)(2,7,9,15,10,16,8,11)(17,19)(18,23)(20,30)(21,27)(22,28)(24,31)(25,32)(26,29)(33,35)(34,39,42,48)(36,44)(37,45)(38,46)(40,47,41,43)(18,24)(23,31)(25,29)(26,32)(33,36,38,37)(34,40,42,41)(35,44,46,45)(39,47,48,43)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.